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Telegram/SourceFiles/history/history_item_text.cpp

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "history/history_item_text.h"
+
+#include "history/history_item.h"
+#include "history/history_item_components.h"
+#include "data/data_media_types.h"
+#include "data/data_web_page.h"
+#include "data/data_groups.h"
+#include "data/data_peer.h"
+#include "lang/lang_keys.h"
+#include "ui/text/text_options.h"
+
+TextForMimeData HistoryItemText(not_null<HistoryItem*> item) {
+	const auto media = item->media();
+
+	auto mediaResult = media ? media->clipboardText() : TextForMimeData();
+	auto textResult = mediaResult.empty()
+		? item->clipboardText()
+		: TextForMimeData();
+	auto logEntryOriginalResult = [&] {
+		const auto entry = item->Get<HistoryMessageLogEntryOriginal>();
+		if (!entry) {
+			return TextForMimeData();
+		}
+		const auto title = TextUtilities::SingleLine(
+			entry->page->title.isEmpty()
+				? entry->page->author
+				: entry->page->title);
+		auto titleResult = TextForMimeData::Rich(
+			TextUtilities::ParseEntities(
+				title,
+				Ui::WebpageTextTitleOptions().flags));
+		auto descriptionResult = TextForMimeData::Rich(
+			base::duplicate(entry->page->description));
+		if (titleResult.empty()) {
+			return descriptionResult;
+		} else if (descriptionResult.empty()) {
+			return titleResult;
+		}
+		titleResult.append('\n').append(std::move(descriptionResult));
+		return titleResult;
+	}();
+	auto factcheckResult = [&] {
+		const auto factcheck = item->Get<HistoryMessageFactcheck>();
+		return factcheck
+			? TextForMimeData::Rich(base::duplicate(factcheck->data.text))
+			: TextForMimeData();
+	}();
+	auto result = textResult;
+	if (result.empty()) {
+		result = std::move(mediaResult);
+	} else if (!mediaResult.empty()) {
+		result.append(qstr("\n\n")).append(std::move(mediaResult));
+	}
+	if (result.empty()) {
+		result = std::move(logEntryOriginalResult);
+	} else if (!logEntryOriginalResult.empty()) {
+		result.append(u"\n\n"_q).append(std::move(logEntryOriginalResult));
+	}
+	if (result.empty()) {
+		result = std::move(factcheckResult);
+	} else if (!factcheckResult.empty()) {
+		result.append(u"\n\n"_q).append(std::move(factcheckResult));
+	}
+	return result;
+}
+
+TextForMimeData HistoryGroupText(not_null<const Data::Group*> group) {
+	Expects(!group->items.empty());
+
+	const auto columnAlbum = [&] {
+		const auto item = group->items.front();
+		if (const auto media = item->media()) {
+			if (const auto document = media->document()) {
+				return !document->isVideoFile();
+			}
+		}
+		return false;
+	}();
+	const auto hasCaption = [](not_null<HistoryItem*> item) {
+		return !item->clipboardText().empty();
+	};
+	if (columnAlbum) {
+		const auto simple = !ranges::any_of(group->items, hasCaption);
+		if (!simple) {
+			auto result = TextForMimeData();
+			for (const auto &item : group->items) {
+				if (result.empty()) {
+					result = HistoryItemText(item);
+				} else {
+					result.append(u"\n\n"_q).append(HistoryItemText(item));
+				}
+			}
+			return result;
+		}
+	}
+	return [&] {
+		auto &&nonempty = ranges::views::all(
+			group->items
+		) | ranges::views::filter(
+			hasCaption
+		) | ranges::views::take(2);
+		auto first = nonempty.begin();
+		auto end = nonempty.end();
+		if (first == end) {
+			return TextForMimeData();
+		}
+		auto result = (*first)->clipboardText();
+		return (++first == end) ? result : TextForMimeData();
+	}();
+}